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Bug 312964 - Allow PackIndex to GC under memory pressure
Summary: Allow PackIndex to GC under memory pressure
Status: NEW
Alias: None
Product: JGit
Classification: Technology
Component: JGit (show other bugs)
Version: unspecified   Edit
Hardware: All All
: P3 enhancement (vote)
Target Milestone: ---   Edit
Assignee: Project Inbox CLA
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Reported: 2010-05-14 15:10 EDT by Shawn Pearce CLA
Modified: 2012-05-05 16:52 EDT (History)
1 user (show)

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Description Shawn Pearce CLA 2010-05-14 15:10:22 EDT 
When PackFile opens a PackIndex to scan it, the PackIndex sticks around forever.  This mirrors C Git behavior which does the same thing.  But in a server environment JGit may need to juggle thousands of pack indexes within a single JVM.  If a repository isn't accessed frequently, or even if its ancient history is infrequently accessed, some (or all) of its PackIndexes should be able to be discarded from memory and reloaded later on demand.

We might also want to tie these into a limited size cache, similar to what we already do with ByteWindow.